Huazheng HZJ User manual

HZJ & HZJZ Oil
Type Testing Transformer
t
Huazheng Electric Manufacturing (Baoding) Co., Ltd

Dear use r:
Thank you for cho os in g HZJ & HZJ Z Oil Type Testing Transformer.
We ho pe that this instrum ent can mak e your wo rk easier an d mo re
enjoyable, so th at you can get the feeling of office auto ma ti on in the test
and ana ly si s work.
Before using the in st ru ment , ple ase read this manual, and operate and
maintain the instru ment accord in g to the manual to prolong its service life.
"Just a lig ht press, the test will be com pl eted auto mati ca lly" is the
operating chara ct eristi cs of this instrum en t.
If you ar e sat isfied wi th th is instrum en t, please tell you r colleagues;
if you ar e not satisfie d with this instrum ent, please call (03 12 ) 6775656 to
tell you to serve you at all tim es-Baoding Huazheng Elect ric Manufactu ring
Co. , Ltd., our company will def in itely make you sati sf ied !

Contents
HZJ & HZJZ Oil Type Testing Transformer.................................................................................. 1
I.Introduction......................................................................................................................................1
II.Structure......................................................................................................................................... 1
III.Principle Of Work......................................................................................................................... 1
IV.Technical Parameters..................................................................................................................2
V.Test Wiring......................................................................................................................................4
HZXC HV Hipot Control Unit.......................................................................................................... 8
HZTC HV Hipot Control Unit........................................................................................................ 10
I.Outline............................................................................................................................................10
II.Main Characteristics...................................................................................................................10
III.Panel Introduction...................................................................................................................... 11
IV.Technical Parameter................................................................................................................. 12
V.Connection Wire Sketch Drawing Of It And High Voltage Test Transformer....................12
VI.Manual Explanation.................................................................................................................. 13
VII.Usage And Maintenance.........................................................................................................13
VIII.Supplementary Explanation.................................................................................................. 14
IX.Electrical Schematic Diagram................................................................................................. 15
Packing List..................................................................................................................................... 16

1
HZJ & HZJZ Oil Type Testing Transformer
I.Introduction
The test transformer calls the booster, it is the basic
test equipment used by the power station, supplying and
distributing the electrical power system and the scientific
research unit. Which used in the insulated intension test on
all kinds of electrical products, electrical equipments and
insulated materials, testing the insulated level of products,
discovering the insulated objection of quizzee, scaling the
capacity burdened voltage.
II.Structure
They make up of the high quality cold rolling silicon
steel piece by HZJ alternating current test transformer,
HZJZ alternating and direct current amphibious light high
voltage test transformer. The winding is the concentric pagoda and multilayer
cylindrical type, low-voltage winding in inner, high-voltage winding in outside; Outer
cover is portable which has characteristics, such as volume smallness, weight light, the
shape prettiness and move convenience and so on.
III.Principle Of Work
Connecting the control unit (it is the supplementary equipment of test transformer,
detailed see the explaining book) with work frequency 220V (above 10KVA with 380V),
adjusting 0-220V/380V voltage input to HZJ (HZJZ) test transformer primary winding
through autotransformer. According to the principle of electromagnetic influence, the
secondary (high voltage) winding may gain the same multiple voltage value than the
primary winding with the circle rated that is the high frequency voltage of work frequency.
It can obtain the direct current high frequency voltage after commuted by high frequency
voltage silicon stack and filtrated by capacitor, among whose amplitude value is the 2
times value of work frequency.

2
This series product divides into three kinds: the alternating current is named YDJ, the
alternating and direct current is named as HZJZ, meanwhile, may connecting HZJ, HZJZ
with 200V switch to form series excitation transformer.
IV.Technical Parameters
1．Technical parameters of HZJ series alternating current test transformers.
Model
Capacity
（KVA）
High
Frequency
Voltage
Output
Voltage
（KV）
High
Frequency
Voltage
Output
Current
（mA)
Low Frequency
Voltage input
Ratio
Tempera
- ture(℃)
raised/
30
minute
V
A
HZJ-1.5
1.5
50
30
200
7.5
500
10
HZJ -3
3
50
60
200
15
500
10
HZJ -5
5
50
100
200
25
500
10
HZJ -10
10
50
200
220/380
50/26
500
10
HZJ -20
20
50
400
380
53
500
10
HZJ -30
30
50
600
380
79
500
10
HZJ -40
40
50
800
380
105
500
10
HZJ -50
50
50
1000
380
132
500
10
HZJ -5
5
100
50
200
25
1000
10
HZJ -10
10
100
100
200/380
50/26
1000
10
HZJ -20
20
100
200
380
53
1000
10
HZJ -30
30
100
300
380
79
1000
10
HZJ -40
40
10
400
380
105
1000
10
HZJ -50
50
100
500
380
132
1000
10
HZJ -100
100
100
100
500
263
1000
10
HZJ -150
150
15
10
400
375
1000
10
HZJ -200
200
100
2000
500
400
1000
10
HZJ -250
250
100
2500
380
500
1000
10

3
HZJ -20
20
150
133
380
53
1500
10
HZJ -30
30
150
200
380
79
1500
10
HZJ -50
50
150
333
380
132
1500
10
HZJ -100
100
150
666
500
263
1500
10
HZJ -150
150
150
1000
500
300
1500
10
HZJ -200
200
150
1333
500
400
1500
10
HZJ -250
250
150
1666
380
500
1500
10
HZJ -30
30
200
150
380
79
2000
10
HZJ -50
50
200
250
380
132
2000
10
HZJ -100
100
200
500
380
263
2000
10
HZJ -150
150
200
750
500
300
2000
10
HZJ -200
200
200
1000
500
400
2000
10
HZJ -250
250
200
1250
500
500
2500
10
HZJ -30
30
250
120
380
79
2500
10
HZJ -50
50
250
200
380
132
2500
10
HZJ -100
100
250
400
380
263
2500
10
HZJ -150
150
250
600
500
300
2500
10
HZJ -200
200
250
800
500
400
2500
10
HZJ -250
250
250
1000
500
500
2500
10
Note: 100KVA and the above input voltage may enhance to 3000V or proposed by the
users.
2. Technical parameters of HZJZ alternating and direct current test transformers.
Model
Capacity
（KVA）
High
Frequency
Voltage
Output
（KV）
AC DC
High
Frequency
Voltage
Current
（Ma）
AC DC
Low pressure input
Ratio
Tempera-
ture(℃)
raised/
30 minute
V
A

4
HZJZ -1.5
1.5
50
70
30
15
200
7.5
500
10
HZJZ-3
3
50
70
60
15
200
15
500
10
HZJZ -5
5
50
70
100
15
200/380
25
500
10
HZJZ-10
10
50
70
200
100
380
50/26
500
10
HZJZ -20
20
50
70
400
100
380
53
500
10
HZJZ-30
30
50
70
600
100
380
79
500
10
HZJZ -40
40
50
70
800
100
380
105
500
10
HZJZ-50
50
50
70
1000
100
380
132
500
10
HZJZ -5
5
100
140
100
50
200/380
25
1000
10
HZJZ -10
10
100
140
200
100
380
50/26
1000
10
HZJZ-20
20
100
140
300
100
380
53
1000
10
HZJZ -30
30
100
140
400
100
380
79
1000
10
HZJZ -40
40
100
140
600
100
380
105
1000
10
HZJZ -50
50
100
140
1000
100
380
132
1000
10
V.Test Wiring
1. Wiring schematic drawing of the alternating current (work frequency) pressure test.
Explanation:
Carrying through the alternating current pressure test, it does not only use the HZJ test

5
transformer, but also the HZJZ test transformer. But, when performing the alternating
current pressure test, don’t pull out the short circuit pole on the high compression leg.
2. Wiring schematic drawing of direct current leak and direct current pressure test.
Explanation:
2.1. Engage in the direct current leak and direct current pressure test, it should only use
the HZJZ test transformer and pull out the short circuit pole worked on the high
compression leg.
2.2 When do the electric cable pressure, not to combination capacitance in stead of
potentiometer ，it should read value of the high pressure voltage exactly and it is very
intuitionistic.
2.3 When the direct current is leaked, the microampere meter may direct readout the
value of the direct current pressure test.
2.4 Complete the direct current leak, may carry out direct current pressure test directly
without taking out stitches.
2.5 Need to add capacitance when doing arrester test.
3. Series Excitation Combination Test Transformer Wiring.
3.1 When carry out alternating current series high frequency voltage test transformer, may
form test transformer with high voltage compounding a few set of HZJ . This principal is

6
that HZJ high frequency voltage winding is connected with the excitation wilding, and
make their parameter the same with the next-step primary winding.
3.2 Schematic drawing of two set of HZJ series excitation test transformers.
3.3 Schematic drawing of three set of HZJ series excitation transformers.
Explanation：
Control unit will provide power to the primary test winding, at the same time, the end and
crust of primary high frequency voltage winding touches the floor, the head will be
connected with high frequency voltage’s end and its crust of the secondary test
transformer. The primary series excitation switch provides power to the secondary low
frequency voltage excitation winding. The same principal can be applied into the tertiary,
the output voltage of the tertiary test transformer is the voltages sum of these three test

7
transformer, that’s to say, U(sum) ＝u1 ＋u2 ＋u3 ，at the same time, the capacity
relationship is S(sum)=s3×3.
3.4 HZJZ will form the direct current series excitation test transformer, but we need to
add 2 2u silicon stack into the test transformer which is the highest frequency voltage
after exchange series excitation.
1. Test transformer should be applied into use with control unit, as for how to use
control unit, please see Operation Manual of Control unit.
2. Screening wire should be applied into the direct current test to avoid straying
leakage. After test, discharge rod is applied to release the restored electricity.
3. The end of high frequency voltage filtering capacitance should be connected with
the ground wire, together with crust of control unit to connect with the earth wire.
4. The whole test should follow the regulation in high frequency voltage test site,
should pay more attention to the safety of equipment and body.

8
HZXC HV Hipot Control Unit
Control Box(≤10KVA)
If the capacity of main control box is not more than10KVA the panel of the main
control box is as figure 4.
Figure 4 Panel of main control box
The operation of the insulation test with HZJ series HIPOT tester is as follow:
1) Please make grounding connection for sample object, HV transformer and main
control box first
2) Please discharge the sample object if the sample object is a capacitive equipment.
3) Please make connection for tester and sample object according to figure 3.
4) Please make power connection for main control box.
5) Confirm the high voltage value in withstand.
6) Setting the protection value of current by the pointer on the over current protection
relay panel.
7) Adjust the regulator to zero position and then press down the close button on the

9
panel the tester with enable the high voltage output unit.
8) If the regulator is not at zero position when you press down the close button the high
voltage output unit would not be enabled. There is a zero position indication lighter on
the panel of the main control box.
9) Adjust the high voltage output to the withstand test value step by step. Read the high
voltage value and LV current from meters at the same time.
10) Start the timer by the timer switcher on the main control box panel when the high
voltage has.
11) If the current over the value set on the panel of the over current relay the tester would
cut off the power supply of HV transformer immediately. It is said the test result is
failure.
12) If the timer display value reach the set value the tester would have a sound alarm to
inform operator that the withstand time is ok. If the tester has not start the over current
protection unit before sound alarm it is said the test result is ok.
13) Open the power supply of HV transformer by press down the “open” button on the
panel of the main control box when test is end.
14) Please discharge the high voltage circuit of sample equipment before remove off the
cable connection of high voltage circuit.
Please do not start the test if some part of the tester had been destroyed.

10
HZTC HV Hipot Control Unit
I.Outline
HZTC series control station is a complete set of equipment of high voltage test
transformer, it and the test transformer carry out resistance pressure and leakage test.
This product is in according with electric industrial standard DL/T848.2-2004.
II.Main Characteristics
This series product has characteristics, such as beautiful appearance, small volume,
light weight, simply operation and conveniently maintenance.
This series control station is consists of touch type voltage adjustor and circuit on
control, measure and signal. After goes through work frequency power 230V/400V, adjust
the output voltage of voltage adjustor(namely the input voltage of test transformer), then
accept the required test high voltage(the pressure value which is tester ）， which work
principle is as the follow drawing.
FU2
FU4
HG
HR
FU1
FU3 SP KM
KM
KO ST
KM
KM
LJ
TA
LJ A
L4L3
TY
L1 L2
KM
KM
V
KM AC Touch Machine HG、HR Indicator TY Auto Voltage Adjustor
LJ Current Relay TA Current Mutual Inductance KO Zero Switch

11
III.Panel Introduction
Series Controller(≥10KVA)
If the capacity of main control box is over 10KVA the panel of the main control box is as
following:
1、HV voltmeter（KV）2、LV ammeter（A）3、Over current protection setup

12
4、Power 5、Operate 6、Withstand voltage time setup
7、Timer 8、Over current protection ratio(×1, ×2,OFF)
9、Handle of voltage regulator 10、Start 11、Stop
12、Power Input 220V/380V
13、Output 0~250V/430V 14、Meter 15、Grounding
IV.Technical Parameter
Model
Power
Output
Phase
Value
Voltage
（V）
Frequency
（HZ）
Voltage
（V）
Current
（A）
HZTC-10
1/2
230/400
50
250/430
28/16.3
HZTC-15
2
380
50
430
23.3
HZTC-20
2
380
50
430
32.6
HZTC-30
2
380
50
430
46.5
HZTC-50
2
380
50
430
69.8
V.Connection Wire Sketch Drawing Of It And High Voltage Test
Transformer

13
VI.Manual Explanation
1．As the table shows, please connect the control station with the test transformer,
also please do not forget to connect with the floor line. After careful examination, you can
make electricity go through it.
2．When the electricity goes through, please turn the voltage adjustor to Null, Zero
Switch turns on and the signal turns on too(which indicate that the output of the voltage
adjustor is Zero).
3．Press the Start Button, connect with touch machine, and plug the voltage adjustor
in, at the same time, the power signal light will turn off, but working signal light will turn on.
4．Whirl the voltage adjustor slowly and clockwise, and read carefully the voltage
meter, when it reaches the required voltage, please stop whirling and change the opposite
direction to whirl until it reaches back to Zero.
5．After the examination, please press Stop Button, to shut off the touch machine, and
the working signal light will turn off, but the Zero Signal Light will turn on.
6．This equipment is installed with over-current protection. Over-current relay should
be chosen when you get the data by examination. But the relay always is setting to be
80% of the rated data. When it look a little over-loaded, please reset it according to the
loaded current, to guarantee the safety of this equipment. During the voltage is becoming
higher and higher, this experimental equipment will be proved not to be qualified if it
becomes short-current, over-loaded relay, and the power were shut down. When it
happens, you should whirl the adjustor to Zero Level.
VII.Usage And Maintenance
1．When you open the box, you need to check whether it’s in good condition or not,
especially you need to check whether the connection ports become loose or not, and the
carbon brush connects with the voltage adjustor well or not.
2．Strictly follow the procedure, please read the manual first.
3. If it has been not in use for a long time, you should check main circuit floor
insulating resistance by 2500V MΩ meter, and the data should not below 1.5MΩ.

14
VIII.Supplementary Explanation
HZTC series control station is another set of equipment of light test transformer, it has
characteristics, perfect capacity, beautify appearance, small volume, light weight, beside,
also has the function of switch on and timing, which manual explanation is same as TC
control station.
1、Over-current rated value= Over-current relay dial reading ×K
Among which, K is as a state value of change/excise (-SA) switch of current power,
respectively for as 1, 2, ∞., K of the switch in ×1、×2 shift is as 1 and 2 respectively, excise
shift is as +∞(in normal condition without using it to avoid damaging the equipment due to
lost the protection for transformer.
2、Electric control station is normally above 30KVA. As for client convenience, it
adopts the methods of increasing voltage, decreasing voltage. The method of voltage
increasing is same as manual, firstly fast, secondly slow. When the required voltage of
increasing voltage is coming, don’t press the button forever, it’d better loose a little (press
and loose by turns). During the voltage decreasing, press the button of decreasing voltage
until charcoal brush back to zero, then the zero signals light is on, you can press the
button of stop. Finally, shut off the general switch (air switch).
3、Panel drawing of control station and connection drawing, see the annex.
4、This control station could measure the high voltage leak current of the tester.
Please measure the high voltage leak current after accomplish the test of the AC voltage
during in using to prevent occurring short circuit phenomenon and produce high voltage
which exist dangers for operator. The specific procedure is as following:
First, connect the back connection board of the control station in specific wire, and
then carry out the AC voltage test. Second, link the high voltage end part of the control
station and test transformer (see the wiring sketch drawing in the next page) namely could
read the value of the high voltage current.

15
IX.Electrical Schematic Diagram

16
X.Packing List
No.
Item
Qty
1
Main engine
1
2
Control Box
1
3
Power line
1
4
Test line
1